Mixer does not mix 4 cups of flour with 6 eggs very easily

sat on the kitchen table and with a screwdriver started to disasemble the mixer,hardest part was taking snap ring off (easy after you buy snap ring pliers)as gears were lifted off noticeable wearing was present on all parts. the bearing housing on the gearcase was broken lose, the only major expense. the other parts are not expensive so i decided to renew all parts. glad i did felt proud of myself when job was done. would do it again Joe